Vagrant not working with localhost extension on Chrome
Find related information here: https://bugs.chromium.org/p/chromium/issues/detail?id=489973
In short: this seem to be a known Chrome feature: /etc/hosts is ignored for resolution of host names ending with .localhost, as OS X specific security mitigation. Comment 22 indicates a workaround: add 127.0.0.1 localhost. into /etc/hosts (and note the trailing dot after "localhost.").
For host management you can use a special plugin https://github.com/devopsgroup-io/vagrant-hostmanager AFAIR they resolved Chrome + MacOS issue